Measure voltage at the input current sensing resistor. Check for a short circuit to ground on the +3VALW filter capacitors. (Power brick light blinks or cuts out) Blown ceramic MLCC capacitor or shorted High-Side MOSFET.
The Compal LA-F952P motherboard is a widely used laptop circuit board found in popular entry-level and mainstream gaming laptops, most notably the and L340-17IRH Gaming series. Powered by 9th Generation Intel Core processors (Coffee Lake Refresh-H) and NVIDIA GeForce GTX 1650 or GTX 1050 graphics cards, this platform balances performance with affordability.
Verify that the (Reset signal) is sitting high at 3.3V. la-f952p schematic
Use the schematic to identify the BIOS chip and check for active BIOS signals. 4. Components and Signal Naming Conventions The LA-F952P schematic uses standard electronics notation: PL/PL_: Power Inductors (Coils). PQ/PQ_: Transistors (MOSFETs). PU/PU_: Integrated Circuits (ICs). PR/PR_: Resistors. PC/PC_: Capacitors.
Do not attempt to guess component locations. Use the Boardview software to find the exact pin to measure. Measure voltage at the input current sensing resistor
If you are a technician or engineer looking for the schematic, follow these steps:
A very specific request!
If you find a short on a low-voltage line (like +VCC_CORE or +1.2V_DDR ), never inject 19V to find the hot component. Inject no more than the native voltage of that specific rail (e.g., 1.0V for CPU lines) to avoid instantly destroying the CPU SoC.
: Operates auxiliary controllers, early power gating circuits, and foundational USB controller status nodes. 3. Core Processing Buck Converters ( VCCCORE and +VGA_CORE ) The Compal LA-F952P motherboard is a widely used
: High-level overviews of the system power sequence, timing, and SMBUS architecture. Power Rail Maps
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